How often do you want to heroic strike? I'm used to using it fairly often, but then I rage starve myself. I'm getting the impression that its better to not use it that often, unless bursting with a cooldown.

I don't know. When you have a personal healer on your ass and you're getting focused only by 1 player, I would use berserker over Battle/Defence stance anyday, due the excess rage it gives you for heroic strikes so you can "return the favor" with full rage bar more easily.

If i'm not getting focused at all, Battle stance for sure. I'd use Defence stance only when you don't have any healers to keep you up and/or you're getting a lot of unehealable damage in. Sure being only def stance works too but it only really works for your favor when you're trying to slowly grow your TFB stacks and just teasing/interrupting the opponent.

But I can see why most players would prefer being Def most of the time - the burst with all the classes is so high that when you get cc'd and focused during cc, it is better to have that extra damage reduction so you wouldn't die so easily. But why not start with berserker, get the rage nearly maxed in just a few seconds of combat and switch being to def stance until you feel that you are ready to burn all your cd's with battle?